Improvement in steam-generators



esoneri o. Sampson;l or JaMEsToWN, NEW YORK.

Letters Patent N 1 03,87,datezl May 17, 1870.

IMPROVEMENT I STEAM-GENERATORVS.

The Schedule referred t imthese Letters Patent and making part of thesame."

Toall whomit lmay concern:

Be it known that I, GEORGE O. SAMPSON, of Jamestown, in the county ofChautaulua and State of -New York, have invented a new and usefulImprovement in Steam-Generators; and I do lhereby declare that thefollowing is a full,: clear, -and exact description thereof, which willenable othersl skilled in the art to make and use the same, referencebeing had to the accompanying vdrawings forming part of thisspecitication. A i

This invention relates to steam-generators; and consists iu certainimprovements thereon, which :.vll be specified hereinafter.

Figure 1 represents a longitudinalsectional elevationV of a boilerconstructed according vto my improvements; and

Figure 2 represents a transverse sectional elevation ofthe same. v

Similar letters of reference. indicate corresponding parts.

A represents the hollow 'plates composing the sec tions oi' which theboiler is constructed, by clamping them, together by the bolts B, andproviding passages or water-connections from one to the other, anduepassages through them; also providing afire-spaceat the bottom byforming vertical notches in the lower end ofthe plates.

Hitherto, these sections have all been made Avthe :same 1ength,and' thelower ue hasbeenext'ended through the rear end plate A, discharging intoa sheetmetal bonnet, for conveying it to the upper returniiues D. YThisbonnet is exposed to the air, and radiares a large amount of heat whichis lost tothe upper' ilues.

'lo 'econoi'nze this heat, I propose to arrange this bonnet or flue inone or more of Vthe rear plates or' sections, as shown in iig-,1, where,instead of conducting the flue-passage C directly through the lastplate, I have turned it upward, 'at O', to the return-lines D, leaving awater-space behind it for the .water therein to receive the benefit ofthc heat now given olf through the bonnet.- v

I also propose lto make the plates behind the bridge E shorter thanalong the fire-space, as an 'economy of metaland cost of construction;for the application. of heat at this pant is l so ineffectual as to be awaste instead of an economy.

For a further economy of heat, I arrange the return-dues in zigzaglines, as shown at E, to cause the heat-currents, which naturally ow instraight lilies, to impinge against the sides, and thereby act moreintensely upo'n the waters. Thesez'igzag lines are formed by arrangingthe ues i'or each plate obliquely through it, and placing them togetherin the order represented in the drawings that is to say,lthevsidcs ofthe plates from which the tubes yissue nearest thel top are placedtogether, and vice versa.

Having thus described my invention,

.I claim as new and desire to secure by Letters Patent;

The arrangement of the return-dues E in the' ho]- low plates A in zigzaglines, substantially as specilied.

' GEO, 0. SAMPSON.

Witnesses:

Saint.. G. Love, W. HARRY BLINN.

